Water heater



J. E. MOOR E- WATER HEATER May 1o, 1955 Filed March 22, 1954 m ILMW,

Jack E. Moore IN VEN TOR.

United States Patent WATER HEATER Jael; E. Moore, Granite Falls, N. C. Appiication March 22, 1954, Serial No. 417,615

1 Claim. (Ci. 219-41) This invention relates to a water heater and particularly to a submersion-type heater for heating water for baptismal pools, or the like.

In the utilization of pools or other vessels for supplying water or other liquid for baptismal or other purposes it is desirable to maintain the water at a particularly pleasant temperature so that the persons being baptised will not be shocked, chilled, or otherwise deleteriously atected by contact with the water.

In the pool heater according to the present invention a terminal box is constructed of water-proof material, such as metal, and a plurality of apertures are provided therein for heating elements of the water-proof type and a waterproof cover is connected on the device. The entire device is then connected to a conduit which is utilized as a support for the box so that the elements may be maintained within the water in a pool.

lt is accordingly an object of the invention to provide an improved water heater.

lt is a further object of the invention to provide a water-proof heater which may be immersed in the water in a pool.

Other objects and many of the attendant advantages of the present invention will be apparent from the following detailed description taken in conjunction with the accompanying drawing in which:

Figure l is an elevation partially in section of a baptismal pool with the water heater installed therein;

Figure 2 is a perspective view of the heating unit; and

Figure 3 is an enlarged Sectional elevation through the heating unit taken substantially on the plane indicated by section line 3 3 or" Figure 2 and showing the construction and arrangement thereof.

In the exemplary embodiment according to the invention a pool water is maintained in any suitable device such as the tank liner 12 herein shown as supported in the ground 14.

The heating unit is constructed of a terminal box 16 preferably formed from suitable Water-proof material, such as the metal box. Preferably the box 16 is constructed as a unit either by forging from a sheet, casting or otherwise.

A plurality of apertures 20 and 22 are provided in the bottom of the box 16 and a plurality of Water-proof heating elements 24 are provided with U-shaped construction having ends 26 and 28 extending into the apertures 20 and 22, respectively. The ends 26 and 28 are joined by a plate 30 which is secured to the box 16 by suitable means such as the screw fasteners 32.

2,708,233 Patented May 1G, 1955 The heating elements 24 may be of any suitable type, but preferably consist of a resistance heating element embedded in insulating material and encased in a metal tube. The heating element is provided with terminals 34 and 36 which extend outwardly from the ends 26 and 28 for connection to suitable terminals such as the bus bars 40 and 42. Gbviously, any desired number of the elements 24 may be provided in the box 16 and the bus bars 40 and l2 will connect similar terminals together so that all of the elements 24 may be connected in parallel. Obviously, the terminals of the various elements could be connected in series circuit relation if such a relationship was desired. The box 16 is provided with a plurality of inturued lugs lf-i and a substantially flat cover element 46 is provided with apertures 43 through which extend screw fasteners S0 for engagement in a threaded aperture 52 in the lugs 48.

The cover Li6 is usually constructed of water-proof material such as metal, or the like, and a compressible gasket 54 is placed between the edge or" the box 16 and the cover 46 and is compressed by the screw fasteners 50 to provide a water-proof seal between the box 16 and the cover 46.

A conduit 6i) communicates with the interior of the box 16 preferably by means of an aperture 62 in a boss 64 in the cover d6. A pair of electrical conductors 66 and 65 extend through the conduit 66 into the box 16 and the terminals thereof are connected to the bus bars 40 and 42, respectively to supply electrical energy to the heaters 24.

lf desired, a thermostat 7'@ may be supplied for controlling the ow of electrical energy over the conductors 66 and 63, the conductors 66 and 68 being connected to any suitable source of electrical energy (not shown).

For the purpose of exemplilieation a particular embodiment of the invention has been shown and described according to the best present understanding thereof. However, and it is apparent that various changes and modications in construction and arrangement of the parts may be readily resorted to without departing from the true spirit and scope of the invention.

What is claimed as new is as follows:

A water heater for immersion in a water tank comprising an elongated closed water-proof box having a cover provided with a central upstanding conduit and a bottom provided with pairs of openings spaced longitudinally of the box, a plurality of U-shaped waterproof electrical heating elements depending from said bottom with ends secured in water-tight relation in the pairs of openings, and a pair of terminals extending into said box, and a pair of bus bars extending longitudinally in the box and connected respectively to corresponding terminals of the pairs, said bus bars having ends extend ing upwardly through said conduit for connection to a pair of conductors.

References Cited in the file of this patent UNITED STATES PATENTS Re. 20,954 Karcher Dec. 27, 1938 1,065,465 Nathan lune 24, 1913 1,258,767 Hadaway Mar. 12, 1918 1,522,992 Abbott Ian. 13, 1925 

